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Synthesis of NiFe2O4-LDH Composites with High Adsorption and Photocatalytic Activity for Methyl Orange Degradation

Authors :
Cristian D. Valencia-Lopez
Mario Zafra-Calvo
María José Martín de Vidales
Verónica Blanco-Gutierrez
Evangelina Atanes-Sanchez
Noemí Merayo
Francisco Fernandez-Martinez
Antonio Nieto-Marquez
Antonio J. Dos santos-Garcia
Source :
Inorganics, Vol 6, Iss 3, p 98 (2018)
Publication Year :
2018
Publisher :
MDPI AG, 2018.

Abstract

The presence of hazardous chemicals in wastewater produced by industrial activities and human metropoles is threating the availability of safe drinking water. The development of a multifunctional material coupling adsorption and photocatalytic activity is hereby particularly promising for the removal of pollutants. We have proved the adsorption and catalytic activity of NiFe2O4-layered double hydroxide (LDH) composite through the degradation of methyl orange (MO) at room temperature under visible light. This degradation is enhanced by using a set of small light-emitting diodes (LEDs) providing a uniform 405 nm UV light. The remediation process is based on a first-step rapid adsorption of MO molecules by the LDH structures followed by the photocatalytic oxidation of the pollutant by the (·OH) radicals produced by the NiFe2O4 semiconductor nanoparticles (NPs). The magnetic properties of the ferrite NPs allow a facile separation of the composite from the liquid media via a simple magnet. NiFe2O4-LDH composite could find wide application as a highly effective adsorbent/oxidizing catalyst operating under visible or near UV light.

Details

Language :
English
ISSN :
23046740
Volume :
6
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Inorganics
Publication Type :
Academic Journal
Accession number :
edsdoj.80027b537d5f4b44b6a83f625ac61d8f
Document Type :
article
Full Text :
https://doi.org/10.3390/inorganics6030098